It looks like HP has set its eyes on Tegra 4 for its latest Android tablets and inexpensive desktops. It has already announced the detachable $479.99 SlateBook X2 and now it wants to follow up with a 21.5-inch All-in-One Slate 21 system.

As we have mentioned it comes with Tegra 4 processor running Android 4.2.2 and it features a full HD display. Priced at $399 it looks like a great deal for a replacement PC, but many users might have an issue that this is not a Windows based system. Android will do just fine for Facebooking, browsing, YouTube and music - and we believe that this is what kids these days mostly do with their systems.

Since it’s a Tegra 4 based system, some Android gaming will work just fine including, Tegra HD titles. HP didn’t go into much detail about this system, but its kickstand offers viewing angles from 15 to 75 degrees and of course that this is a touch enabled system.

It should come in September in the US market priced at $399 while we are not sure when is this system set to show in Europe or rest of the world. What makes this system really special is the price that is radically lower than similar x86 based Windows systems, but x86 AIO system with Windows can be used for work, while Android based AIOs like the Slate 21 are rather limited. Still, it might be a sign of things to come.